TY - JOUR
T1 - Biallelic targeting of expressed genes in mouse embryonic stem cells using the Cas9 system
AU - Zhang, Yu
AU - Vanoli, Fabio
AU - LaRocque, Jeannine R.
AU - Krawczyk, Przemek M.
AU - Jasin, Maria
PY - 2014
Y1 - 2014
N2 - Gene targeting - homologous recombination between transfected DNA and a chromosomal locus - is greatly stimulated by a DNA break in the target locus. Recently, the RNA-guided Cas9 endonuclease, involved in bacterial adaptive immunity, has been modified to function in mammalian cells. Unlike other site-specific endonucleases whose specificity resides within a protein, the specificity of Cas9-mediated DNA cleavage is determined by a guide RNA (gRNA) containing an ∼20 nucleotide locus-specific RNA sequence, representing a major advance for versatile site-specific cleavage of the genome without protein engineering. This article provides a detailed method using the Cas9 system to target expressed genes in mouse embryonic stem cells. In this method, a promoterless marker flanked by short homology arms to the target locus is transfected into cells together with Cas9 and gRNA expression vectors. Importantly, biallelic gene knockout is obtained at high frequency by only one round of targeting using a single marker
AB - Gene targeting - homologous recombination between transfected DNA and a chromosomal locus - is greatly stimulated by a DNA break in the target locus. Recently, the RNA-guided Cas9 endonuclease, involved in bacterial adaptive immunity, has been modified to function in mammalian cells. Unlike other site-specific endonucleases whose specificity resides within a protein, the specificity of Cas9-mediated DNA cleavage is determined by a guide RNA (gRNA) containing an ∼20 nucleotide locus-specific RNA sequence, representing a major advance for versatile site-specific cleavage of the genome without protein engineering. This article provides a detailed method using the Cas9 system to target expressed genes in mouse embryonic stem cells. In this method, a promoterless marker flanked by short homology arms to the target locus is transfected into cells together with Cas9 and gRNA expression vectors. Importantly, biallelic gene knockout is obtained at high frequency by only one round of targeting using a single marker
U2 - https://doi.org/10.1016/j.ymeth.2014.05.003
DO - https://doi.org/10.1016/j.ymeth.2014.05.003
M3 - Article
C2 - 24929070
SN - 1046-2023
VL - 69
SP - 171
EP - 178
JO - Methods (San Diego, Calif.)
JF - Methods (San Diego, Calif.)
IS - 2
ER -